The future of renewable energy is fundamentally a choice, not a foregone conclusion given technology and economic trends, according to this report. It examines the future of renewable energy in the context of: total energy share by sector; integration between utilities, buildings, industry and transportation; business models and investment; urban planning; national and regional policy; and technology, cost and market growth. The report is based on the opinions of 170 leading experts and the projections of 50 recently published scenarios. It finds a wide range of expert projections of the share of renewable energy in the global energy mix by 2050, with low estimates below 20 per cent to high estimates upwards of 50-95 per cent. Experts predicted that the expansion of renewable will accelerate through 2020, particularly in leading developing countries such as Argentina, Chile, Colombia, Egypt, Ghana, Indonesia, Jordan, Kenya, Mexico, Nigeria, the Philippines, South Africa and Thailand.